it was too late. >> someone came in and told us mark had died. you know, life for us ended that day. >> reporter: what came next was another shock for the bower, the toxicology report, revealing how mark died and what was in his system. >> i asked, were there any illegal drugs or alcohol in his system. when he said no, i felt a sense of relief. >> in mark's room, his parents found a clear plastic bag with pills. according to the toxicology report, he ingested oxycodone, morphine, acetaminophen and methamphetamine. >> they were prescription drugs, but they were not his. for did they belong to anyone in the family. >> every day on the average, 2,500 kids use and abuse prescription drugs for the first time to get high. that's a devastating statistic. >> reporter: sadly his case is not unique. >> this is more than all of the individuals abusing cocaine, heroine, what louis jens and inhalants kind combined. >> the drug dealers look different. they could be us sometimes. >> reporter: on the last day of life, he lifted weights, went to his part-time job